Package org.apache.tajo.catalog

Examples of org.apache.tajo.catalog.Schema

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  /**
   * It checks if an output schema of a projectable node and target's output data types are equivalent to each other.
   */
  private static void verifyProjectableOutputSchema(Projectable node) throws PlanningException {

    Schema outputSchema = node.getOutSchema();
    Schema targetSchema = PlannerUtil.targetToSchema(node.getTargets());

    if (outputSchema.size() != node.getTargets().length) {
      throw new PlanningException(String.format("Output schema and Target's schema are mismatched at Node (%d)",
          + node.getPID()));
    }

    for (int i = 0; i < outputSchema.size(); i++) {
      if (!outputSchema.getColumn(i).getDataType().equals(targetSchema.getColumn(i).getDataType())) {
        Column targetColumn = targetSchema.getColumn(i);
        Column insertColumn = outputSchema.getColumn(i);
        throw new PlanningException("ERROR: " +
            insertColumn.getSimpleName() + " is of type " + insertColumn.getDataType().getType().name() +
            ", but target column '" + targetColumn.getSimpleName() + "' is of type " +
            targetColumn.getDataType().getType().name());
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  }

  private void verifySetStatement(VerificationState state, BinaryNode setNode) {
    Preconditions.checkArgument(setNode.getType() == NodeType.UNION || setNode.getType() == NodeType.INTERSECT ||
      setNode.getType() == NodeType.EXCEPT);
    Schema left = setNode.getLeftChild().getOutSchema();
    Schema right = setNode.getRightChild().getOutSchema();
    NodeType type = setNode.getType();

    if (left.size() != right.size()) {
      state.addVerification("each " + type.name() + " query must have the same number of columns");
      return;
    }

    Column[] leftColumns = left.toArray();
    Column[] rightColumns = right.toArray();

    for (int i = 0; i < leftColumns.length; i++) {
      if (!leftColumns[i].getDataType().equals(rightColumns[i].getDataType())) {
        state.addVerification(type + " types " + leftColumns[i].getDataType().getType() + " and "
            + rightColumns[i].getDataType().getType() + " cannot be matched");
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    return finder.getColumnRefs();
  }
 
  public static Schema getSchemaByTargets(Schema inputSchema, Target [] targets)
      throws InternalException {
    Schema schema = new Schema();
    for (Target target : targets) {
      schema.addColumn(
          target.hasAlias() ? target.getAlias() : target.getEvalTree().getName(),
          getDomainByExpr(inputSchema, target.getEvalTree()));
    }
   
    return schema;
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      }
    }
    if(maxIndex == null) {
      return null;
    } else {
      Schema keySchema = new Schema();
      for(int i = 0 ; i < maxIndex.length ; i ++ ) {
        keySchema.addColumn(maxIndex[i].getSortKey());
      }
      Datum[] datum = new Datum[nodeList.size()];
      for(int i = 0 ; i < nodeList.size() ; i ++ ) {
        datum[i] = ((ConstEval)(nodeList.get(i).getRightExpr())).getValue();
      }
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  @Override
  public Object clone() throws CloneNotSupportedException {
    InsertNode insertNode = (InsertNode) super.clone();
    insertNode.overwrite = overwrite;
    insertNode.tableSchema = new Schema(tableSchema);
    insertNode.targetSchema = targetSchema != null ? new Schema(targetSchema) : null;
    insertNode.path = path != null ? new Path(path.toString()) : null;
    return insertNode;
  }
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                                      boolean last) throws IOException {
    BSTIndex index = new BSTIndex(new TajoConf());
    BSTIndex.BSTIndexReader idxReader =
        index.getIndexReader(new Path(outDir, "index"));
    idxReader.open();
    Schema keySchema = idxReader.getKeySchema();
    TupleComparator comparator = idxReader.getComparator();

    LOG.info("BSTIndex is loaded from disk (" + idxReader.getFirstKey() + ", "
        + idxReader.getLastKey());
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      }
    } else {
      joinNode.init(joinEdge.getJoinType(), left, right);
    }

    Schema mergedSchema = SchemaUtil.merge(joinNode.getLeftChild().getOutSchema(),
        joinNode.getRightChild().getOutSchema());
    joinNode.setInSchema(mergedSchema);
    joinNode.setOutSchema(mergedSchema);
    if (joinEdge.hasJoinQual()) {
      joinNode.setJoinQual(AlgebraicUtil.createSingletonExprFromCNF(joinEdge.getJoinQual()));
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                                      boolean last) throws IOException {
    BSTIndex index = new BSTIndex(new TajoConf());
    BSTIndex.BSTIndexReader idxReader =
        index.getIndexReader(new Path(outDir, "index"));
    idxReader.open();
    Schema keySchema = idxReader.getKeySchema();
    TupleComparator comparator = idxReader.getComparator();

    LOG.info("BSTIndex is loaded from disk (" + idxReader.getFirstKey() + ", "
        + idxReader.getLastKey());
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    return this.schema;
  }

  public Schema getLogicalSchema() {
    if (hasPartition()) {
      Schema logicalSchema = new Schema(schema);
      logicalSchema.addColumns(getPartitionMethod().getExpressionSchema());
      return logicalSchema;
    } else {
      return schema;
    }
  }
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    return specs;
  }

  public static Schema sortSpecsToSchema(SortSpec[] sortSpecs) {
    Schema schema = new Schema();
    for (SortSpec spec : sortSpecs) {
      schema.addColumn(spec.getSortKey());
    }

    return schema;
  }
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Related Classes of org.apache.tajo.catalog.Schema

  • org.apache.tajo.benchmark.TPCH
  • org.apache.tajo.catalog.partition.PartitionMethodDesc
  • org.apache.tajo.catalog.store.HCatalogStore
  • org.apache.tajo.engine.eval.EvalTreeUtil
  • org.apache.tajo.engine.eval.TestEvalTree
  • org.apache.tajo.engine.eval.TestPredicates
  • org.apache.tajo.engine.eval.TestSQLExpression
  • org.apache.tajo.engine.function.TestDateTimeFunctions
  • org.apache.tajo.engine.function.TestMathFunctions
  • org.apache.tajo.engine.function.TestPatternMatchingPredicates
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